Quote:
Originally Posted by Allan
Stephen, set up your dob and view the moon during the day and you will see that it is not that bright. I do my lunar observing next to my house with the lights on so I don't get dark adapted, and I can observe without filters.
I have a range of good Baader ND filters I don't use, because side by side comparison showed noticeably more detail and contrast without the filters.
If you are set on using an ND filter in a dark location, you will need the 13% transmission filter for your dob.
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Thanks Allan, I've been using the same technique - backyard lit up like the MCG - and this does no good whatsoever when I move my eye to the eyepiece.
Quote:
Originally Posted by Astro_Bot
I use 13% on an ED80 and find it "about right" from a dark site and perhaps slightly dim at home in the suburbs.
I also use 13% on a 10" SCT and find it way too bright from any location, and so do non-dark adapted passers by.
For an 18" aperture, I suggest the 13% and the 25%!
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Quote:
Originally Posted by Doogs38
I have a 13% ND filter & find the moon almost too bright to view comfortably with my 14" dob. I'm thinking about mating it with a 25% filter to cut down all that light!
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Jumped in the deep end and ordered a Lumicon 13% and 25% from Agena Astro! Thanks guys!